The internal energy change (in J) when 90 g of water undergoes complete evaporation at `100^(@)C ` is ______ . (Given : `Delta H_("vap")` for water at 373 K = 41 kJ mol , `R = 8.314 JK^( 1) mol^( 1)`) Vapor Pressure Springer Nature Link What is E when 2.0 mole of liquid water vaporises at 100C? The heat of vaporisation, H vap. of water at 100C is 40.66 kJmol^ 1. Sarthaks eConnect Largest Online Education Community Predicting the Enthalpy of Vaporization and Calculating the Entropy of Vaporization of 87 Octane Gasoline Using Vapor Pressure Law of Equipartition of Energy Energy is equally distributed among all degrees of freedom Each degree contributes kT per molecule Translational, rotational,